HomeWork-1
Problems:
1)From table 13.1, it is given that coefficient of Y84 is 0.545, which is nothing but the difference in average
fertility rate from 1972 to 1984 considering there are no variable changes, but if we consider increase in
average educati

Predictive modeling I
Midterm exam
#1. Kang keep track of BUAL majors starting salaries. Does taking Kangs predictive modeling
1 affect starting salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale,
PM=1 if student took predictive mod

Predictive modeling I
Midterm exam
#1. Kang of BUAL majors starting salaries. Does Kangs modeling 1 affect starting salary? Let
SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student took modeling
1, and PM= otherwise. the data, wh

Predictive modeling I
Midterm exam
#1. Kang keep of BUAL majors starting salaries. Does taking Kangs modeling 1 affect starting
salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student
took modeling 1, and PM= otherwise.

Predictive modeling I
Midterm exam
#1. Kang keep of BUAL majors starting salaries. Does taking Kangs predictive modeling 1
affect starting salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1
if student took predictive modeling

Predictive modeling I
Midterm exam
#1. Kang of BUAL majors starting salaries. Does taking Kangs modeling 1 affect starting
salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student
took modeling 1, and PM= otherwise. the d

Predictive modeling I
Midterm exam
#1. Kang of BUAL majors starting salaries. Does Kangs modeling 1 affect starting salary? Let
SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student took modeling
1, and PM= otherwise. the data, wh

Predictive modeling I
Midterm exam
#1. Kang keep of BUAL majors starting salaries. Does taking Kangs predictive modeling 1
affect starting salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1
if student took modeling 1, and PM=

Predictive modeling I
Midterm exam
#1. Kang keep of BUAL majors starting salaries. Does taking Kangs modeling 1 affect starting
salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student
took modeling 1, and PM= otherwise.

Predictive modeling I
Midterm exam
#1. Kang keep of BUAL majors starting salaries. Does taking Kangs modeling 1 affect starting
salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale, PM=1 if student
took modeling 1, and PM= otherwise.

Chapter 13
7(i) Below is the equation we should be looking at
Table: Illustration of the Difference-in-Differences Estimator
see Equation (13.10).
As we can see, the estimated coefficient on afchange in Equation (13.12) is very small in magnitude (and whe

1(i) It has been fairly well established that socioeconomic status affects student performance. The error
term u contains, among other things, family income, which has a positive effect on GPA and is also very
likely to be correlated with PC ownership.
1(

Predictive modeling I
Midterm exam
#1. Kang keep track of BUAL majors starting salaries. Does taking Kangs predictive modeling
1 affect starting salary? Let SAL=salary in dollars, GPA=grade point average on a 4.0 scale,
PM=1 if student took predictive mod